@Article{,
author="",
title="A SELF-TUNED FUZZY-SET BASED POWER SYSTEM
STABILIZER WITH THE AID OF GENETIC ALGORITHMS
AND ARTIFICIAL NEURAL NETWORKS",
journal="Iranian Journal of Science and Technology Transactions of Electrical Engineering",
year="2013",
volume="23",
number="1",
pages="1-10",
abstract="A fuzzy-set based power system stabilizer is proposed to enhance the stability of a power system. The controller parameters are optimized using Genetic Algorithm (GA). An Artificial Neural Network (ANN) is then trained so that the controller parameters are self-tuned based on operating conditions. The performance of the proposed approach has been assessed by simulating it on a single machine infinite busbar system.
",
issn="2228-6179",
doi="10.22099/ijste.2013.1099",
url="http://ijste.shirazu.ac.ir/article_1099.html"
}
@Article{,
author="",
title="A software modification procedure for conversion of a scalar controller to a vector type for induction motor",
journal="Iranian Journal of Science and Technology Transactions of Electrical Engineering",
year="2013",
volume="23",
number="1",
pages="11-25",
abstract="This paper establishes a relationship between two techniques for the control of current controlled induction motors, namely scalar control with flux loop and direct vector control. This is accomplished through theoretical comparison of the governing equations that relate the input and the output signals in the respective controllers. In traditional scalar control, the controller outputs are and , while in vector type they are and . In each method two signals are produced which define the reference current. It is desirable to improve these two controllers, so that similar information is derived for the reference current. With this achievement, it will be shown how an existing scalar controller may be converted to a vector control type (with improved responses) by software modifications. Computer simulation is demonstrated for a typical 3 HP motor",
issn="2228-6179",
doi="10.22099/ijste.2013.1100",
url="http://ijste.shirazu.ac.ir/article_1100.html"
}
@Article{,
author="",
title="Total stability of fuzzy feedback control systems",
journal="Iranian Journal of Science and Technology Transactions of Electrical Engineering",
year="2013",
volume="23",
number="1",
pages="27-34",
abstract=" In this paper, the total stability of specific fuzzy control systems is studied. The plant of the system is assumed to be a linear system and the fuzzy controller is of Sugeno type. The stability analysis is based on some newly developed theorems that guarantee sufficient conditions for the total stability of the system. The analysis results are applied to the stabilization problem of an unstable plant.
",
issn="2228-6179",
doi="10.22099/ijste.2013.1101",
url="http://ijste.shirazu.ac.ir/article_1101.html"
}
@Article{,
author="",
title="A computationally efficient adaptive controller for robotic manipulators using the theory of passive systems",
journal="Iranian Journal of Science and Technology Transactions of Electrical Engineering",
year="2013",
volume="23",
number="1",
pages="35-46",
abstract=" This paper develops a new adaptive control law for rigid robotic manipulators, which is computationally very fast and therefore suitable for real-time implementations. This globally convergent adaptive controller is a modified version of the original scheme presented earlier, but results in simpler design conditions in comparison with the previous work in this area. The convergence properties of the proposed scheme are established through a basic theorem, using the theory of passive dynamic systems. Other aspects of this paper, such as a new general lemma on passive systems, which is utilized in proof of the basic theorem, and a procedure for determining the design parameters, are also of interest. This algorithm is simulated on a digital computer and the results confirm theoretical studies.
",
issn="2228-6179",
doi="10.22099/ijste.2013.1102",
url="http://ijste.shirazu.ac.ir/article_1102.html"
}
@Article{,
author="",
title="Active electromagnetic suspension system for ground vehicles",
journal="Iranian Journal of Science and Technology Transactions of Electrical Engineering",
year="2013",
volume="23",
number="1",
pages="47-56",
abstract="Application of a new control strategy on actuators used in electromagnetic vehicle suspension systems has been studied in this paper. The vehicle is modeled as a quarter car in which the unsprung mass is supported by two vertically arranged electromagnetic actuators having a nonlinear behavior. The nonlinear actuators, having forces proportional to the square of the electric current and inversely proportional to the square of their distances from the mass, are controlled using a simple and feasible control strategy named "Performance Based Time-Delay". It is shown that this control strategy can result in excellent system performance compared to the conventional passive suspension system or other control strategies implemented in active suspension systems. The vibrations due to road roughness are controlled by changing magnetic fluxes of the actuators. Less required computational steps, use of an on-line digital computer, overall system simplicity, and achievement of a better response to larger high frequency disturbances are among the advantages of the system controller.
",
issn="2228-6179",
doi="10.22099/ijste.2013.1103",
url="http://ijste.shirazu.ac.ir/article_1103.html"
}